This is the amount of energy required to change the state of a substance from liquid to gas. it starts with an h 18 characters

Physics

1 answer:

nevsk [136]3 years ago

3 0

Heat of vaporization has that amount of energy that required to change the state of a substance from liquid to gas.

<u>Explanation:</u>

Enthalpy/heat of vaporization refers to the energy which requires to transform the substance from liquid to gas. The amount of energy and pressure remains same in this process. In constant temperature and pressure, substance can change its form from liquid to gas.

A substance can remain in three forms solid, liquid and gaseous. Energy required to undergo transformation from solid to gas is known as heat of fusion. Latent heat refers to the heat energy to change substance from one state to other.

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Hope this helps! God bless
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the specific heat of water is 4.2 j/c. if it takes 31,500 joules to heat to warm 750 g of water, what was the temperature change

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The amount of heat needed to increase the temperature of a substance by $\Delta T$ is given by
$Q=mC_s \Delta T$
where
m is the mass of the substance
$C_s$ the specific heat capacity
$\Delta T$ the increase in temperature

In our problem, the mass of the water is m=750 g, the specific heat is $C_s = 4.2 J/g ^{\circ}C$ and the amount of heat supplied is $Q=31500 J$ , so if we re-arrange the previous formula we find the increase in temperature of the water:
$\Delta T= \frac{Q}{m C_s}= \frac{31500 J}{(750 g)(4.20 J/g^{\circ} C)}=10^{\circ}C$

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